Hi guys I have an s5 vert with a turbo swap and big single turbo. My tank was rusty so the best deal I found was on a s4 tank. I already installed it and I got the connector off the s4 harness and I matched up the colors on my s5 harness and spliced in the connector. I also installed my walbro 450 pump onto the s4 fuel pump sending unit. I wired the red walbro cable under the screw which a blue cable goes to the top of. I wired the black walbro cable to the bottom of the screw of the ground cable on the assembly. Now my car does not start because fuel is not being sent in. Im pretty sure i wired something wrong in the fuel sending unit. I have searched like crazy and its unbelievable that no one had any issues installing a walbro onto an s4. Can someone please explain in detail how to do this? Car has been running fine but just had a rusty tank so i decided to swap it out.

 

Here you go, chap.

Walbro 1G/2G RX7 fuel pump kit install